I hear they've promoted Tom．but he didn't mention ______ when we talked on the phone．
| A．to promote |
| B．having been promoted |
| C．having promoted |
| D．to be promoted |
Don’t leave Tom alone－he is in such a large house.
| A．frightening | B．to frighten |
| C．frightened | D．Frighten |
—Congratulations passing your driving test!
—Thank you.
| A．at | B．on |
| C．from | D．In |
According to some scientist , every human being, _____, gives off body heat.
| A．what he is doing | B．however he is doing |
| C．whatever is he doing | D．no matter what he is doing |
The companies are working together to create _____ they hope will be the best means of transport in the 21st century.
| A．which | B．that | C．what | D．who |
How long do you think it will be _____ I can go back to work?
| A．before | B．when | C．until | D．that |